Abstract:
The muffle furnace and thermogravimetric analyzer are used to analyze pyrolysis characteristics of Fushun oil shale, the results show that the temperature from 300 ℃ to 600 ℃ is the main weightlessness stage of Fushun oil shale, and the weightlessness rate is nearly 20%.By conducting microscopic CT experiments on the oil shale samples after the action of high temperature, the results are:after the effect of high temperature, a large number of pores and cracks are formed inside the oil shale.However, the increase of porosity is small, indicating that the macropore is not developed,and most of the pores are in a state of isolated distribution, with poor interconnectedness and less percolation probability.Therefore, hydraulic fracturing or other methods should be used to improve the permeability in the early stage of mining.